Valve mechanism



2 Sheets-Sheet 1.

C. BELKNAP 8: J. W. BRADLEY.

(NoModeL) VALVE MEGHANISM.

Patented Oct. 16, 1883.

. I @mmm Enggf N V ENTRS Charles Bc-lf acq) (No Model.) 2 Sheets-Sheet2. C. BELKNAJ 81; J. W. BRADLEY. VALVE MBGHANISM.

No.'286,676. l `Patented Oct. 16, 1883.

UNITED STATES CHARLES BELKNAP, oF nninenronr,

PATENT o AND JOHN vv. BRADLEY, on srnAr FORD, ASSIGNORS OF ONE-HALF TOTEE BEI/ENAP MANUFACTURING l I COMPANY, OF BRTDGEPORT, CONNECTICUT.

Y VALVE MECHANISM.

` SPECIFICATION forming' part of Letters Patent No. 286,676, datedOctober 16, 1883.

Application led January 23, 1883. (No model.)

To all LLI/lion?,k t may concern;

Be it known that we, CnARLns BELKNAP, of

Bridgeport, and JOHN W. BRADLEY, of Strat" ro valves, but is applicableto other' kinds of valves.

The object of our invention is to provide Y for the accurate fitting ofthe disk or valve to the valve-seat in such a way that not only anoriginal valve and its seat maybe conveniently made to fit exactly, butalso so that either may be readilyreplaced, when worn, by another,without inconvenience in detaching the parts ofthe valve, and withoutreplacing the valve- 2o shell. l

A very common method of making checkvalves which have metallic seats isto form the seat within and as an integral part ofthe shell. The conseqnence is that the interior of the shell, where the seat is formed, hastobe specially ground after the shell is cast, and if the valve provesnot to be tight from wear or other cause, it becomes necessary to detach,the shell and regrind its interior seat, or to 3c throw the'whole awayand replace itby a new shell and valve-seat. Besides this it requiresspecial and costly tools and the employment of skilled labor to grindthe seats properly within the interior of the valve-shells. Ourinvention seeks to do away with these objections and overcome thesediiilculties by providing a simple economical structure, which may bereadily taken to pieces. and repaired iwhen out of order by the merereplacing of 4o special parts without special iitting being required.

In the accompanying drawings, illustrating our improvements, Fig-ure lis a central section. Fig. 2 is a central section taken at right 4 5angles with Fig. l. Fig. :Sis a central section Wof a modied form ofvalve-shell and of a reciprocating valve. Fig. 4 is a plan view ofone-half of the valveshell, (shown in Fig. 3,)

eating valve.

lsmooth at E to receive the valve.'

exhibiting its interior, containing the recipro- Referring to theletters upon the drawings, A indicates a valve-shell, whichmay be of anysuitable construction, composed of at least two parts capable of beingtightly joined together, and of being separated conveniently at will.

A good form ofvalve-shell is shown in Figs. l and 2, where it isrepresented as composed vof three parts, two of them formingpipe-connections, and the central part forming thecup or recess for thevalve mechanism, and being joined to one pipeconnection by means of aflange, B, projecting from one pipefconnection andresting upon acorresponding seat, C, in the central portion of the shell, andbeingjoined to the other pipe'connection by means of screw-threads. Y Dindicates a recessed or dished independent valve-seat, iitting withinthe central part of the shell and provided with a central openingcoincident with the pipe-connections, and The valveseat is formedintegrally with shoulders d, in which are formed sockets e for thebearinglpin j of the hinged valve. The disk-valve seat is firmly clampedbetween sections A and B by means of the screw-collar C. The side wallsof the valve-seat constitute a tight internal packing and a guide orsupport for the valve.

F indicates a disk or valve proper, smooth on its face to iit thesmoothV surface of the 8o valve-seat, and connected looselyia any ordi-.nary and suitable way-as, for example,Vv legna.

a screw and nut, in this instancefwith an oscillating arm, G, pivot-edat one side of the valve-seat. The disk is preferably mounted on anangular stem, as shown, so that, although loose, it will not rotate. Theobject of loosely connecting the disk with the oscillating arm is thatwhen the disk is brought down upon the smooth surface of the seat andpressed to 9o place, it may Atilt slightly in any direction necessary toautomatically accommodate itself to the seat and press evenly upon allpoints, thus making a perfectly tight joint under all circumstances; andthe object of having the disk non-rotating is that if any cavity orprotuberance occur in its face it will form only one protuberance orcavity in the seat which will correspond with and neutralize that of thedisk. In rotating disks a single nick or 5 cavity will often form aseries of protuberances on the seat, which will destroy the smoothbearing-surface and mar the efficiency of the valve. The result is a newvalve-disk may be applied at any time and it will be sure to make atight fit. A reciprocating instead of an oscillating valve-disk may beemployed,

as illustrated in Figs. 3 and 4, where it will be seen that the valvehas a certain limited play, being guided within the recessed valveseatby the spider-arms H, and being free to automatically adj ust itself, soas to fit perfectly and press equallyupon all parts of the smoothbearing-surface of the valve-seat, thus making a perfectly-tight `joint.

Having thus described the construction and operation of our improvedvalve mechanism, what we claim to be new therein, and desire to secureby Letters Patent of the United States,

1. An improved valve composed of a valveseat, a stiff hinged arm havinga stationary bearing, and a non-rotating disk loosely connected to thearm, substantially as set forth, so that when the disk is pressed ,toits seat it 3o. is free to adjust itself and bear equally at all points.

2. The combination, with the sectional valveshell, of an independentremovable dished or recessed valve-seat, rmly clamped between thesections of the shell (whereby a tight in- 3 5 ternal packing isafforded) and the valve contained within the valve-seat, substantiallyas described.

3. rIhe combination of the hinged valve'and an independent removabledished or recessed 4o Valve-seat' with shoulders integrally formedtherewith, which are provided with sockets for the bearing-pin of thehinged Valve, substantially asset forth.

4. The combination, with the valve-shell, of an independent removabledished or recessed valve -seat, containing a valve composed of a hingedarm and a removable disk loosely connected together, the valve-seat andvalve being conveniently removable together' from the shell,substantially as set forth.

In' testimony whereof we have hereunto subscribed our names this 19thday of January, A. D. 1883.

lCHARLES RELKNAR JOHN W. BRADLEY.

Witnesses:l

A. H. WARNER, D.`T. ELLIs.

